Installing a Borla ATAK catback system on a 2020 Sierra Denali 6.2L, long wheel base

Jump to the part you want: 01:09 Stock Exhaust Clips 02:40 Factory Exhaust Removal 07:48 Borla ATAK installation 10:35 After installation and sound clips I have largely neglected this channel, which despite its name was intended to feature DIY projects, especially woodworking (as the name implies) but also electronics, computers, automotive, and whatever else I happen to be building. I have a new vehicle and that means some new projects, so reviving this channel, this is the first of project Denali SS. This video shows the installation of the Borla ATAK catback system part number 140784 along with the necessary 60706 long wheel base adapter on a 2020 Sierra Denali 4WD 6.2L crew cab standard bed truck. https://www.borla.com/products/chevro... https://www.borla.com/products/chevro... This catback features a dual split tip to replace the factory rectangle exhaust ports. The tips are a rounded square profile which I think fits the body lines of the truck nicely. The whole system is made of T-304 stainless. The tips themselves are chrome, or they were. Due to my aversion to chrome and that finish being the only one offered on this exhaust with this tip style prior to installing I changed the tip to a brushed finish. It's still technically chrome, but no longer mirror-reflective. I can live with that. I wanted to keep options open for the exhaust. During installation it is required to cut the stock exhaust in order to get it off the vehicle. I cut mine as close as I could to the Borla attachment points so I could possibly have an exhaust shop weld on some sleeves and make it possible to remove the ATAK muffler and polyphonic harmonizer assembly and bolt my stock muffler back in place if I ever wanted to. If all goes well this would be about as difficult as swapping wheels for winter, and would retain most of the Borla pipes, especially the tips which look much better than stock. Borla also does a great job of considering changing tastes with their design, it's possible to replace the polyphonic harmonizer with a Borla S-Type muffler and inexpensively change this system into an S-Type should the ATAK prove to be too loud. How loud is it? Much louder than stock, but not too loud. I like to hear my engines, and I want a good sound out of them, but I do not like my cars to be obnoxiously loud. I have often found that if the front of the exhaust remains stock (exhaust manifolds and factory catalysts) that the ATAK is a good loudness for my taste. If I were to do other exhaust work, I'm sure it would be too loud for me. At the end of the video see some after shots with high quality sound recordings of the new exhaust captured on high end audio equipment. I also had the opportunity to run the truck on a dyno to get some power numbers with the exhaust installed. Unfortunately I didn't get a chance to baseline before the installation, so I don't know what the difference was. But the numbers this 6.2L LT1 (technically L87, which is just the truck variant of the LT1) puts down are pretty strong. The truck is (was) stock except for the Borla ATAK at the time. Sound effect credit About: Air horn very loud and clear. great annoying and loud sound effect. Title: Air Horn License: Attribution 3.0 Recorded by Mike Koenig